Please use this identifier to cite or link to this item: http://cmuir.cmu.ac.th/jspui/handle/6653943832/52363
Title: Kinetics study of photocatalytic activity of flame-made unloaded and Fe-loaded CeO<inf>2</inf>nanoparticles
Authors: D. Channei
B. Inceesungvorn
N. Wetchakun
S. Phanichphant
Keywords: Chemistry
Energy
Materials Science
Physics and Astronomy
Issue Date: 16-Dec-2013
Abstract: Unloaded CeO2and nominal 0.50, 1.00, 1.50, 2.00, 5.00, and 10.00 mol% Fe-loaded CeO2nanoparticles were synthesized by flame spray pyrolysis (FSP). The samples were characterized to obtain structure-activity relation by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), Brunauer, Emmett, and Teller (BET) nitrogen adsorption, X-ray photoelectron spectroscopy (XPS), and UV-visible diffuse reflectance spectrophotometry (UV-vis DRS). XRD results indicated that phase structures of Fe-loaded CeO2nanoparticles were the mixture of CeO2and Fe2O3phases at high iron loading concentrations. HRTEM images showed the significant change in morphology from cubic to almost-spherical shape observed at high iron loading concentration. Increased specific surface area with increasing iron content was also observed. The results from UV-visible reflectance spectra clearly showed the shift of absorption edge towards longer visible region upon loading CeO2with iron. Photocatalytic studies showed that Fe-loaded CeO2sample exhibited higher activity than unloaded CeO2, with optimal 2.00 mol% of iron loading concentration being the most active catalyst. Results from XPS analysis suggested that iron in the Fe3+state might be an active species responsible for enhanced photocatalytic activities observed in this study. © 2013 D. Channei et al.
URI: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84890023883&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/52363
ISSN: 1687529X
1110662X
Appears in Collections:CMUL: Journal Articles

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